10 USC 333: Presidential Authority Under the Insurrection Act

Section 333 of Title 10, now recodified as 10 U.S.C. § 253, is the provision of the Insurrection Act that gives the president the broadest domestic deployment authority. Under 10 U.S.C. § 333, the presidential authority to deploy the military reaches two situations: when domestic unrest so disrupts a state that people are being deprived of constitutional rights and state authorities are unable, unwilling, or refusing to protect them, and when organized activity opposes or obstructs the enforcement of federal law.¹ In either case, the president can act without a request from the state and, if necessary, over a governor’s objection.

What Section 253 Authorizes

The statute has two distinct prongs. The first is a federal backstop for civil rights: when a state fails its own residents, whether through incapacity or refusal, the president can order in federal troops to restore the protection the state should be providing. The second prong tracks more closely with a general federal-law enforcement power, allowing deployment when private actors are blocking federal statutes, orders, or court judgments from being carried out.

Once invoked, the section allows the president to use the armed forces or the federalized National Guard to suppress the underlying unrest. Troops operating under this authority can perform functions that ordinarily would be barred to the military, including detentions, crowd control, and physical enforcement of court orders.

Where Section 253 Sits Among the Insurrection Act Provisions

Section 253 is one of three triggering provisions in the modern Insurrection Act. Section 251 covers deployments a state itself requests through its legislature or governor.² Section 252 lets the president deploy troops, without a state request, when rebellions or organized resistance make ordinary federal law enforcement impracticable in the president’s own judgment.³

Section 253 is the provision most often discussed when the concern is a state government that is itself the obstacle, whether because officials are actively resisting federal authority or because they will not use their own machinery to stop rights violations on the ground.

How Section 253 Overrides the Posse Comitatus Act

The general rule is that the military does not do civilian law enforcement. The Posse Comitatus Act makes it a federal crime to use the Army, Navy, Marine Corps, Air Force, or Space Force to execute domestic laws, with penalties of up to two years in prison.⁴ The statute carves out an exception for cases expressly authorized by an Act of Congress, and the Insurrection Act is that authorization. When the president invokes Section 253, the legal wall between soldiers and police duties comes down for the scope and duration of the order.

The Proclamation Requirement

Before troops can act under any part of the Insurrection Act, the president must issue a proclamation ordering those involved in the insurrection, rebellion, or obstruction to disperse and go home within a set time.⁵ The statute treats this as mandatory: the president “shall, by proclamation, immediately order” dispersal. In practice, the proclamation and the deployment order often come the same day, so the interval is procedural rather than a real cooling-off period. The proclamation is directed at the people causing the unrest, not at state officials, and it is not a notice-and-consent step for the governor.

Deployment Without a Governor’s Consent

A governor cannot block a deployment under Section 253. The Constitution assigns Congress the power to call forth the militia to execute federal law, suppress insurrections, and repel invasions, and Congress delegated that authority to the president through the Insurrection Act. Delegates at the 1787 Constitutional Convention considered and rejected a state-consent requirement, on the reasoning that the state executive is sometimes the source of the problem.

The president can also federalize a state’s own National Guard under 10 U.S.C. § 12406, pulling those units out of the governor’s chain of command and placing them under federal control when there is a rebellion or danger of one against the United States, or when regular forces are insufficient to execute the laws.⁶ A governor who refuses to cooperate can find their own Guard units serving under federal orders anyway.

How the Power Has Been Used

The clearest Section 253 deployment in modern history is Little Rock in 1957. When Arkansas Governor Orval Faubus used the state’s National Guard to block nine Black students from entering Central High School in defiance of Brown v. Board of Education, President Eisenhower federalized the Arkansas Guard and sent soldiers from the 101st Airborne Division. Troops arrived within hours and stayed for the school year, escorting students past hostile crowds. A state was actively refusing to protect the constitutional rights of its residents, which is the situation Section 253’s first prong is written for.

President Kennedy used similar authority in 1962 when Mississippi Governor Ross Barnett personally blocked James Meredith from registering at the University of Mississippi. After a mob attacked federal marshals on campus, Kennedy federalized the Mississippi National Guard and deployed Army troops from Fort Bragg; two people were killed before the campus was secured. In 1992, President George H.W. Bush deployed federal troops during the Los Angeles riots, but at California’s request, making that a Section 251 deployment rather than a unilateral one.

Can Courts Review the President’s Decision?

Whether a court can second-guess a Section 253 (or § 12406) call-up is unsettled, and 2025 produced significant new rulings.

The traditional posture is heavy deference. In Mississippi v. Johnson, the Supreme Court held that federal courts cannot enjoin the president from carrying out duties it described as “purely executive and political.”⁷ Youngstown Sheet & Tube Co. v. Sawyer set the outer limit on the other side: the president can invoke powers Congress has granted but cannot invent new ones, even in emergencies.⁸

In Newsom v. Trump, the U.S. District Court for the Northern District of California issued a temporary restraining order against a federalization of National Guard troops, finding that the president exceeded his statutory authority and violated the Tenth Amendment.⁹ On appeal, the Ninth Circuit held that courts can review whether statutory conditions for calling up the National Guard were met, though under a “highly deferential standard” requiring only a “colorable assessment of the facts and law within a range of honest judgment.”¹⁰ In a companion case, Oregon v. Trump, the Ninth Circuit reiterated that neither the political question doctrine nor the statutory text bars judicial review of presidential deployment decisions.¹¹ A concurring judge disagreed, arguing that under existing Supreme Court precedent, presidential determinations under the call-up statute are not reviewable. The split signals the question is not settled, and the Supreme Court has not weighed in on these rulings.

Criminal Exposure for People Who Resist

People who resist or obstruct federal troops acting under Section 253 face potential federal charges separate from any state prosecution. The most serious is seditious conspiracy: conspiring to oppose the authority of the United States by force, or to forcibly prevent or delay the execution of any federal law, carries up to 20 years in prison.¹² Prosecutors must prove both a conspiracy and an intent to use force, so the statute reaches organized resistance rather than individual noncompliance. A separate obstruction statute reaches individuals who use threats or force to obstruct a federal court order being enforced by deployed troops, with penalties of up to one year and fines.¹³ That charge applies when the deployment is connected to enforcing a specific court order, such as a desegregation ruling.

Pending Reform

The current statute leaves the triggering judgment largely to the president, the proclamation is a formality, and until the 2025 Ninth Circuit decisions it was not clear courts would review any of it. S. 2070, the Insurrection Act of 2025, would change several of those defaults.¹⁴ The bill would:

Permit deployment only when state, local, and federal civilian law enforcement are genuinely unable to handle the situation.
Replace the current triggering language with tighter requirements, including that obstructions create an “immediate threat to public safety” and that private actors be in “such numbers, or with such force or capacity, as to overwhelm” civilian authorities.
Automatically terminate any deployment after seven days unless Congress votes to extend it.
Require, for domestic violence situations as opposed to federal law obstruction, either a governor’s request or a supermajority vote of the state legislature.

Whether S. 2070 or something like it will become law is unclear. Until it does, the presidential authority described in what is now Section 253 remains what the 1807 statute and its later amendments made it: broad in its triggers, quick in its procedure, and only lightly checked by the courts.